Stauff NL 630 E 10 B 4 Manometers Replacement Filter Element for Return Line blank filter Element Replacement Filter Element for Return Line Filters Micron Rating: 25 µm Material: Stainless Mesh Outer Diameter (mm): 128 Inner Diameter (mm): 91 Standpipe Branch Tee Size Type: 06S Cutting Ring&Nut On Standpipe Steel Glass Fibre Outer Diameter (mm): 99 3 Length (mm): 399 Sealing: NBR